Venti



Nov. 12, 192.9. J. R. HOWARD 1,735,760

I VENTILATOR Filed-June 1928 2 Sheets-Sheet 1 VIII/Ill ATTORNEY Nov. 12, 1929. .J. R. HOWARD 1,735,750

VENTILAQTOR Filed June 1928 2 Sheets-Sheet 2 OR 11.73.15] award M (0 I i i g ATTORNEY Patented Nov. 12, 192% vnlvrrraroa Application filed June 4, 1928. SerialNo. 282,701.

This invention relates to ventilators and more particularly to those located in the ceilings of rooms or buildings. 7 I

A primary object of the invention is to provide a ventilator in which a horizontal circular motion is transformed into a vertical circular motion.

Another object of the invention is to so construct such a ventilator that a maximum 19 air space will be provided with a minimum area occupation by the device.

Still anotherobject is to construct a ventilator which may be used in connection with a lighting fixture to render it as inconspicuous 7 as possible and permit it to be made orna- Figure 1 represents a plan view of a ventilator constructed in accordance with this,

invention Fig. 2 is a side or edge view thereof, with I the supporting structure shown in section; V

Fig. 3 is a transverse section taken on the line 33 of Fig. 1; Y 7 Fig. 4 is a detail sectional view with the ventilator in open position;

Fig. 5 is a similar view taken on the line 55 of Fig. 6 with the vanes closed; and

Fig. 6 is a view similar to Fig. 1 with the vanes closed. V

The same reference characters indicate corresponding parts in the different figures. Thedrawings illustrate the preferred embodiment of the invention for application to the ceiling ofa room or building and which is designed to be installed in the center of the room, a hole being cut. in the ceiling of a size to accommodate the ventilator. ventilator comprises'a circular plate or frame 1 provided with a plurality of peripherally spaced apertures 2'for, attachment of the frame to a suitable support by fastening elements, not shown. 'A central opening 3 is annular band 8.

The

provided for passage therethrough of a lighting fixture. Around' this openin'g 3f is an annular frame 5 against which the fix}- ture plate of canopy C isdesign'ed to fit firm; ly without interfering with the operation of the ventilator. If no lights are to be used the central opening is preferably closed by la suitable cover, not shown. Y. i

A suitable wire screen 5 isat-tached to the underside of th'e'v-entilatorto prevent the entrance of insects. l r

A plurality of hinged vanes orshutters 6 are arranged radially between the frames 1 and 1., any desired number of which may be employee, sixteen being here shown and whlch together'with the frames may be made of any suitable material and, decorated in any desired manner.

Each of the shutters 6 has a right angular laterally extending arm 7 at its outer end which arm is pivoted at its free end to an which we will term the rotary ring. Chains 10 and 11 are connected with the band 8 and extend through loops 12 and 13 and-have hand grips in the form of rings 14 and 15 which are conven-v iently located so that a pull exerted on one or the other will open or close the shutters 6 either partially or completely according to the pull given. As shown these chains are connected with the band 8 through a pivoted slotted plate 16. said plate being mounted on one of the pivots of an arm 7 v o It will thus be seen that by mounting the shutters radially between the two frames 1 and 4: and hingedly connecting them to swing vertically into open or closed position that when closed the free edge of one will overlap the hinged edge of the next as shown clearly in Fig. 5. The arms 7 of the shutters are made of flexible or springy material being either a part of the shutter turned up or a separate strip of spring material attached to the shutter. This springiness of'the arms 7 takes care of variations of the radius of the I shutters and. thus enables the shutters to direction the pull exerted thereby on the arms 7 of the shutters will cause the shutters to swing vertically in a circular direction to either open or close them.

Pulleys 17 are preferably located in the loops 12 and 13 and over which the chains are trained to facilitate their movement.

Without further description it is thought that the features and advantages of the invention will be readily apparent to those skilled in the art, and it will, of course, be understood that changes in the form, proportion and minor details of construction may be resorted to, without departing from the spirit of the invention or its scope as claimed.

I claim: 7

1', In a ventilator a frame, a plurality of radially disposed vanes hingedly mounted on the frame for movement towards and away from the latter, a manually operable ring encircling the vanes and having operative connection therewith whereby upon rotation of the ring the vanes will be simultaneously adjusted about their axes, oppositely extending flexible operating elements attached to the ring, and guides attached to the frame through which the flexible elements pass.

2. In a ventilator, a frame, a plurality of radially disposed vanes hinged" thereto for movement toward and away from the frame, an arm fixed to each vane and extending at right angles thereto, and a manually operable ring encircling the vanes and having pivotal connection with each arm.

JAMES ROBERT HOWARD. 

